Learn · email signature glossary
TL;DR
Social icons in an email signature are small linked images, one per network, that take recipients to a LinkedIn, X, Instagram, YouTube, or similar profile. Each icon is a hosted image wrapped in a link, normally displayed at 20 to 32 pixels square and lined up in a row beneath the contact details. Text characters and emoji are sometimes used instead, but proper icon images render more consistently and read instantly. The linked profiles can be the company's, the individual's, or a mix, which is a policy decision worth making deliberately.
Re: In practice
Icons answer 'where else can I find you' without adding a line of text per network, and for many businesses the LinkedIn icon in particular does quiet, steady work in sales and recruiting contexts. The main mistake is treating the row as a checklist: six icons including a Facebook page last updated in 2021 dilutes the two profiles that matter and sends readers to dead ends. Include only accounts that are active and presentable, which for most professionals means one to three. Technical care mirrors any signature image: host the icons at stable HTTPS URLs, size them explicitly in the HTML, give each one alt text like 'LinkedIn', and check they remain visible against dark mode backgrounds, where dark glyph icons can disappear.
Fwd: Worth a look
LinkedIn email signature
Link your LinkedIn, Twitter, and other social profiles directly in your email signature.
BIMI logo standard
BIMI is a DNS-based standard that displays your verified logo next to messages in the inbox. Learn its requirements, including DMARC and a VMC.
signature call-to-action
A signature CTA is a call to action, like a booking link or banner, placed in your email signature to turn everyday messages into conversions.
dark mode signature issues
Dark mode inverts email backgrounds and can make logos and text in signatures unreadable. Learn what changes and how to design around it.
what DKIM does
DKIM adds a cryptographic signature to outgoing email that receivers verify against a public key in your DNS, proving the message was not altered.
DMARC policy explained
DMARC is a DNS policy that tells receiving mail servers what to do when a message fails SPF and DKIM checks. Learn how policies and reports work.
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